Silent Myocardial Ischemia in Patients with Variant Angina : PANEL DISCUSSION ON SILENT MYOCARDIAL ISCHEMIA
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概要
- 論文の詳細を見る
Twenty-four hour ambulatory electrocardiographic recording was performed in 56 patients with variant angina admitted to the coronary care unit in order to evaluate the incidence and pathophysiology of silent episodes of ST elevation. Of 696 episodes of ST elevation of more than 0.1 mV identified during a recording period of 141 days, 531 (76%) episodes were completely silent. The incidence of silent episodes increased as the number of total ischemic episodes per day increased. Silent ST elevation revealed a significantly shorter duration and a lower intensity than symptomatic ST elevation. However, there were wide overlaps in the duration and intensity of ST elevation between silent and symptomatic episodes. In some patients, silent and symptomatic episodes of similar duration and intensity were observed. Arrhythmias during ischemic episodes such as premature ventricular contractions, ventricular tachycardia, high grade atrioventricular block, and sinus arrest were observed in 32 of 56 patients, 57% of cases and 9% of the total episodes. Arrhythmias were more common during symptomatic episodes (29%) than during silent ones (9%, p<0.01), but serious arrhythmias such as ventricular tachycardia, high grade atrioventricular block and sinus arrest occurred even during silent episodes. In both silent and symptomatic episodes, the duration and intensity of ST elevation were significantly lower in ischemic episodes with arrhythmias than in those without arrhythmias. These results suggest that 1) the majority of ischemic events are silent in patients with variant angina; 2) the severity of ischemia seems to be an important factor as the cause of anginal pain, but additional factors may be involved; 3) arrhythmias were more common during symptomatic than silent episodes.
- 社団法人日本循環器学会の論文
- 1989-11-20
著者
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Egashira Kensuke
From Reserch Institute Of Angiocardiology And Cardiovascular Clinic Faculty Of Medicine Kyushu Unive
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Nakamura Notoomi
From Reserch Institute Of Angiocardiology And Cardiovascular Clinic Faculty Of Medicine Kyushu Unive
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Takeshita Akira
From Reserch Institute Of Angiocardiology And Cardiovascular Clinic Faculty Of Medicine Kyushu Unive
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Araki Haruo
From Reserch Institute Of Angiocardiology And Cardiovascular Clinic Faculty Of Medicine Kyushu Unive
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Takeshita Akira
From Reseach Institute Of Angiocardiology And Cardiovascular Clinic Faculty Of Medicine Kyushu Unive
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